Description: Dual display power + voltage, up 8 color bars display battery power, downstream voltmeter (display battery voltage) It can be used in a wide range of applications, such as 18650 lithium battery, polymer lithium battery pack, -acid battery, electric vehicle battery, nickel-hydrogen battery, etc. Usage: Connect the positive and negative terminals of the display board to the positive and negative terminals of the battery under test. The digital tube displays the real-time battery power (do not reverse the positive and negative electrodes, otherwise it will be directly damaged ) Working current: 5-15ma, the lower the battery voltage, the smaller the current. 8-band power resolution: 10% 25% 40% 50% 60% 75% 90% 100%. More voltage calculation, the same principle as the electric vehicle's power display. Voltmeter range: DC6-100V Do not over press Working temperature: -10 ~ +65 ° C Package Includes:(5 Pack) 1Pcs Digital Voltmeter